I'm looking at buying the Netgear ReadyNAS Ultra 2-Bay NAS unit and 2 WD Red HDDs. I want to run RAID 1 so that the data is mirrored on both drives. Now, I've read some information on RAID but am not an expert- I have a couple of questions:
1) With RAID 1 my understanding is that if one drive fails, the other will have all of the data. Now, can I take the 1 working drive and plug it into a computer and access/copy the data?
With RAID1, they are mirrored drives, so if 1 fails, the other has the data, but should be accessed from the NAS Unit (it will work with 1 drive failure). If you replace the failed drive, the RAID will rebuild automatically.
If you are concerned with data - I would consider WD Black drives for the setup, as they are the most reliable. That is not to say the red, blue or green drives are junk - I have used them all depending upon the installation requirements (budget, data value, etc).
Thanks for the reply. So you're saying that I shouldn't attempt to access the data from another computer? The reason I ask is what happens if the RAID controller or the NAS unit fails and I can't replace it?
I'll look into the black drives as well. This is going to be for my house, we have a small photography side business and want to make sure all work and personal data is backed up (I also burn data to Blurays for another long term solution)
I realize that, what I meant was if a drive does fail or the controller fails, I want to be able to access my data and since it's mirrored, wouldn't I be able to obtain the data in that method as a resort?
I'm not sure where you're coming from on your last comment. I'm not concerned with the data on my drive on my computers in the event of a NAS failure. I was just asking in a what if scenerio.
Just to clear it up, if a RAID controller fails or a drive fails, etc. I want to know that if I take one of the drives from the NAS in a RAID 1 configuration, can I simply plug that drive into _a_ computer and retrieve the data from that mirrored disk?
In some cases yes. If the RAID controller formats the drive in a proprietary way (I don't know if the NAS you chose does this), your local PC can't read the drive.
With the NAS Controllers I have used in the past, if a drive failed, I replaced it, and then went into the utilities to rebuild the array. Depending upon the number and size of the files, this can take anywhere from 5 minutes to several hours, but your data is safe.
On my home network, I chose to add two WD Black drives as standard drives, and I use SyncBack nightly to backup the data (not just from my computer, but the other computers on the network also go to this drive).